cooler system for august starting to drop into the pacific northwest. that's going to even mean this weekend we're going to continue with this pattern of 70s for inland spots. that area of high pressure that brought us all the heat, that's pushing well here off to the southwest. going to have little influence the next two, three days. tomorrow morning, saturday, mid 50s throughout 4:00, 5:00, 6:00. by 11:00 in the morning, temperatures budging up into the mid 60s in livermore and san jose. everybody in the morning hours tomorrow is probably going to need some sort of jacket as you head out. if you're doing traveling tonight, watch out. we're talking about strong storms throughout new york, washington, d.c., that definitely could have you with delays. we're going to have details on how many triple digit days we've seen this summer. i'm going to do a tally of it. >> i bet i can count it on one hand. >> you may be right. >> she's smart like that. still ahead at 6:00, a new warner from pg&e. why the sun could pose a serious threat to our power grid.